比例控制閥是一種按輸入的電信號(hào)連 續(xù)、按比例地控制液壓系統(tǒng)的流量、壓力和 方向的控制閥，其輸出的流量和壓力可以不受負(fù)載變化的影響。
2.能連續(xù)、按比例地控制液壓系統(tǒng)的 壓力和流量，實(shí)現(xiàn)對(duì)執(zhí)行機(jī)構(gòu)的位置、速 度、力量的控制，并能減少壓力變換時(shí)的沖 擊。
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